once you get past the 1st page of the most expensive quilts at the etsy link, the prices get more reasonable.
materials, tools, and labor are just the starting point. complexity and originality of the pattern and the quilting make a huge difference, too.
i'm still making all sorts of excuses for not diving into freemotion (or anything more complicated than a curvy line, for that matter! :lol: ). and most of my quilts are crib or lap-sized. but if i ever get over my fear of freemotion and make up my mind to wrassle the big ones, watch out. ;-)
just because none of us have the guts to charge that much doesn't mean some of our work isn't worth that much.